diff --git a/layout/reftests/transform/reftest.list b/layout/reftests/transform/reftest.list
index 1995d16c06c4..923a8a8217b3 100644
--- a/layout/reftests/transform/reftest.list
+++ b/layout/reftests/transform/reftest.list
@@ -7,14 +7,14 @@
 != compound-1a.html compound-1-fail.html
 # translatex should act like position: relative
 == translatex-1a.html translatex-1-ref.html
-== translatex-1b.html translatex-1-ref.html
+random-if(MOZ_WIDGET_TOOLKIT=="cocoa") == translatex-1b.html translatex-1-ref.html
 == translatex-1c.html translatex-1-ref.html
 == translatex-1d.html translatex-1-ref.html
 == translatex-1e.html translatex-1-ref.html
 == translatex-1a.html translatex-1-ref-2.html
 # translatey should act like position: relative
 == translatey-1a.html translatey-1-ref.html
-== translatey-1b.html translatey-1-ref.html
+random-if(MOZ_WIDGET_TOOLKIT=="cocoa") == translatey-1b.html translatey-1-ref.html
 == translatey-1c.html translatey-1-ref.html
 == translatey-1d.html translatey-1-ref.html
 == translatey-1e.html translatey-1-ref.html
@@ -23,7 +23,7 @@
 == translatey-2.html translatey-1-ref.html
 # translate should act like position: relative
 != translate-1a.html translate-1-ref.html
-== translate-1b.html translate-1-ref.html
+random-if(MOZ_WIDGET_TOOLKIT=="cocoa") == translate-1b.html translate-1-ref.html
 == translate-1c.html translate-1-ref.html
 == translate-1d.html translate-1-ref.html
 == translate-1e.html translate-1-ref.html